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How do I derive a linear equation for wind speed between 13km/h –50km/h using “if-else”?

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Thomas Portsmouth
Thomas Portsmouth 2020-6-22
关闭： MATLAB Answer Bot 2021-8-20
for i = 1: length(Wind_Year)
if WindLight = nnz((Wind_Year >= 13) & (Wind_Year < 50));
Power = m * x + c;
Power = m * WindLight + c;
Power1 =[Power1; Power];
Day1 = [Day1; i];
elseif WindHeavy = nnz((Wind_Year >= 50) & (Wind_Year <= 100));
Power = m * x + c;
Power = m * WindHeavy + c;
Power2 = [Power2; Power];
Day2 = [Day2; i];
end
end
The data (13 - 50) and (50 - 100) is coming from 12 spreadsheets.

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回答（1 个）

Andreas Bernatzky
Andreas Bernatzky 2020-6-22
you have to index Wind_Year with your increment i.
For example Wind_Year(i) but heavily depends on what type of container your Wind_Year variable belongs to (Table,Vector,Cell...)
  2 个评论
Thomas Portsmouth
Thomas Portsmouth 2020-6-22
source_directory = 'C:\Users\thoma\OneDrive\Desktop\Project 1';
source_file = dir(fullfile(source_directory, '*.csv'));
Wind_Year = [];
for i = 1: 12
file_name = fullfile(source_directory,source_file(i).name);
file_data = xlsread(file_name);
Wind_Month = file_data(:, 7);
Wind_Year = [Wind_Year; Wind_Month];
end
This is where my Wind_Year is coming from, its 12 spredsheets of data.
Andreas Bernatzky
Andreas Bernatzky 2020-7-27
Hello Thomas,
sorry for the late reply. Maybe you can attach one of the (shorter) excel-Sheets?
Than I can have a better look on it.
Your code looks ok to me for iterating over all sheets.

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